Dry weight is pretty much an imaginary number, campers always weigh lots more. But not to worry, your truck won’t have any problem with it.
S&S was a good brand, they’re generally nice campers. The front corner windows are a leak hazard though.
I’m an admitted Bigfoot and Northern Lite biased person, but that’s because I’ve owned a lot of older campers. Leaks and hidden rot are a huge issue with older campers and the older they get the bigger the advantage of the two-piece fiberglass clamshell construction of the BF and NL. You might look at that... but even older ones aren’t super cheap. For good reason.
That S&S is probably a great rig. With most used campers it’s all about the condition of it.
Open every cabinet and hatch and look hard for evidence of leaks or moisture.
I’d do a full exterior re-seal on it ASAP, regardless of how it looks. Old campers start leaking.